. Picture video signal converting/processing circuit for GBA or GBC, comprising:
a main controlling circuit (ASIC) which is a programmable integrated circuit and has an input latch for inputting video signal, the input latch being further connected to a data sampling which generates a sampling time sequence used in a digital/analog signal converter (DAC) for sampling, the data sampling being further connected to a video process, the main controlling circuit (ASIC) being further equipped with a clock control, an address counter, a mode control and a timing control connected to each other;
a memory buffer (SRAM BUFFER) mainly serving to store the RGB video signal in digital form;
an oscillator (CRYSTAL) providing an always varying output pulse signal and keeping identifying and oscillating effect;
a digital/analog signal converter (DAC) able to convert the taken RGB video signal from digital form into analog form and send the signal to a RGB encoder; and
an RGB encoder serving to combine the received RGB video signal and chromatism synchronous signal into a combined signal for a television to receive, the signal being output via AV output terminal into television screen, whereby through the command decoding of the main controlling circuit (ASIC) and in cooperation with the digital/analog signal converter (DAC), the input video signals are converted into RGB signals which are converted by the RGB encoder into video signals acceptable by all kinds of televisions, whereby the picture of the LCD panel of the handheld GBA or GBC can be converted and shown on the screens of various kinds of televisions.